The Facebook artificial intelligence (AI) researchers have created the world’s most detailed population density maps for Bangladesh and the Asia Pacific.

Considering Russia has the ninth highest population in the world, it is the area on this map with the largest gap between its population ranking and its population density ranking.

The number of people in the ageing population was over 1.53 crore in the latest census, which is around 9.28 percent of the total population of 16.51 crore. In the 2011 census, this group ...